CN111255595B - Engine system and vehicle with low pressure EGR - Google Patents
Engine system and vehicle with low pressure EGR Download PDFInfo
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- CN111255595B CN111255595B CN201811453704.9A CN201811453704A CN111255595B CN 111255595 B CN111255595 B CN 111255595B CN 201811453704 A CN201811453704 A CN 201811453704A CN 111255595 B CN111255595 B CN 111255595B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/06—Low pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust downstream of the turbocharger turbine and reintroduced into the intake system upstream of the compressor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
- F02M26/28—Layout, e.g. schematics with liquid-cooled heat exchangers
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
The invention discloses an engine system with low-pressure EGR and a vehicle, wherein the engine system with low-pressure EGR comprises: an engine; the liquid inlet of the engine radiator is communicated with the liquid outlet of the engine, and the liquid outlet of the engine radiator is communicated with the liquid inlet of the engine; a cabin heat exchanger; the liquid inlet of the engine room radiator is selectively communicated with the liquid outlet of the engine room heat exchanger, and the liquid outlet of the engine room radiator is communicated with the liquid inlet of the engine room heat exchanger; the liquid inlet of the engine room radiator is selectively communicated with the liquid outlet of the engine, and the liquid outlet of the engine room radiator is communicated with the liquid inlet of the engine. The engine system with the low-pressure EGR has good power performance and high thermal efficiency.
Description
Technical Field
The invention relates to the field of vehicles, in particular to an engine system with low-pressure EGR and a vehicle.
Background
The engine EGR system is external EGR, and exhaust gas after a catalyst is introduced to the front of an air inlet supercharger and enters an engine cylinder through the supercharger, an air inlet intercooler and a throttle valve. Cooled EGR has some suppression of high load knock, but negatively affects combustion at low load, and in the low load region where EGR is added, combustion instability is caused and there is some risk of misfire. Therefore, the temperature of the cooling liquid is required to be improved under a small load, the friction is reduced, and meanwhile, the combustion stability is increased, so that the fire catching risk is reduced, and the oil consumption is reduced. At medium load, a lower water temperature is required, so that knocking can be suppressed to a certain extent, and at high load and power points, a water temperature as low as possible is required, so that knocking of external characteristics can be further reduced, power is greatly improved, and exhaust temperature is reduced and power is improved at the power points.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. To this end, it is an object of the present invention to propose an engine system with low-pressure EGR which has good dynamic performance and high thermal efficiency.
The invention also provides a vehicle with the EGR engine system.
The engine system with low-pressure EGR according to the invention comprises: an engine; the liquid inlet of the engine radiator is communicated with the liquid outlet of the engine, and the liquid outlet of the engine radiator is communicated with the liquid inlet of the engine; a cabin heat exchanger; the liquid inlet of the engine room radiator is selectively communicated with the liquid outlet of the engine room heat exchanger, and the liquid outlet of the engine room radiator is communicated with the liquid inlet of the engine room heat exchanger; the liquid outlet of the engine room radiator is selectively communicated with the liquid outlet of the engine, and the liquid inlet of the engine room radiator is communicated with the liquid inlet of the engine.
According to the engine system with the low-pressure EGR, disclosed by the invention, the engine system comprises the engine radiator and the engine room radiator, wherein the liquid outlet of the engine is selectively communicated with the liquid inlet of the engine room radiator, or the liquid outlet of the engine room radiator is communicated with the liquid inlet of the engine, so that the engine room cooling circulation is selectively communicated with the engine room cooling circulation, the temperature of cooling liquid in the engine room cooling circulation can be reduced, the temperature of the cooling liquid in the engine room cooling circulation is increased, the service performance of the engine under different working conditions is improved, the adaptability of the engine is improved, and the heat transfer loss of the engine is reduced.
According to one embodiment of the invention, a first on-off valve is arranged between the liquid inlet of the cabin radiator and the liquid outlet of the cabin heat exchanger, and a second on-off valve is arranged between the liquid inlet of the cabin radiator and the liquid outlet of the engine.
According to one embodiment of the invention, the engine system with low pressure EGR further comprises: the liquid inlet of the EGR cooler is selectively communicated with the liquid outlet of the engine, and the liquid outlet of the EGR cooler is communicated with the liquid inlet of the engine.
According to one embodiment of the invention, a third shut-off valve is arranged between the liquid inlet of the EGR cooler and the liquid outlet of the engine.
According to one embodiment of the invention, the engine system with low pressure EGR further comprises: the liquid outlet of EGR heater with the inlet intercommunication of engine.
According to an embodiment of the invention, the nacelle radiator comprises: the liquid inlet of the first engine room radiator and the liquid inlet of the second engine room radiator are respectively communicated with the liquid outlet of the engine room heat exchanger, and the liquid outlet of the first engine room heat exchanger and the liquid outlet of the second engine room heat exchanger are respectively communicated with the liquid inlet of the engine room heat exchanger.
According to one embodiment of the invention, the engine system with low pressure EGR further comprises: and the first cabin radiator, the second cabin radiator and the air inlet heater are sequentially arranged along the air inlet direction of the engine.
According to one embodiment of the invention, the cabin heat exchanger and the engine radiator are arranged in series in the direction in which the outside air enters the cabin.
According to one embodiment of the invention, a pipeline between a liquid outlet of the EGR heater and a liquid inlet of the engine, a pipeline between a liquid outlet of the engine radiator and a liquid inlet of the engine, and a pipeline between a liquid outlet of the engine room radiator and a liquid inlet of the engine are at least partially overlapped to form a first overlapped pipeline, and a first water pump is arranged on the first overlapped pipeline; and a second water pump is arranged between the liquid outlet of the engine room radiator and the liquid inlet of the engine room heat exchanger. A vehicle according to an embodiment of the invention is briefly described below.
According to the vehicle provided with the engine system with low-pressure EGR, the intake temperature of the engine of the vehicle is controllable, the starting performance of the engine at low temperature is improved, meanwhile, the engine cooling liquid circulation and the cooling liquid circulation of the engine room are intersected with each other, the temperature of the cooling liquid can be adjusted more quickly, and the performance of the vehicle is improved. The invention aims to fully utilize the heat emitted by an engine, adjust the air inlet temperature of the engine and the temperature in the engine room, control the temperature of the engine room, ensure that the engine works in a proper temperature range, accelerate the warming-up speed at low temperature, control the air inlet temperature of the engine, ensure that the engine has ideal air inlet temperature, ensure the starting performance of the engine at low temperature, ensure that the cooling liquid circulation of the engine and the cooling liquid circulation of the engine room have a junction so as to more quickly regulate and teach the temperature of the cooling liquid of the engine and the cooling liquid of the engine room.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic block diagram of an engine system having low pressure EGR, according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of the connection between the EGR cooler and the engine according to an embodiment of the invention.
Reference numerals:
in the context of an engine system 100,
the operation of the motor (110) is carried out,
The heat exchanger 130 of the nacelle is,
a nacelle radiator 140, a first nacelle radiator 141, a second nacelle radiator 142,
the EGR cooler 150 is provided in the form of a tube,
the EGR heater 160, the intake air heater 170,
a first on-off valve 101, a second on-off valve 102, a third on-off valve 103, a first overlap line 104,
a first water pump 105, a second water pump 106, a fan 107, and a mixing valve 108.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
An EGR system is an exhaust gas recirculation system of a vehicle, after fuel is combusted in an engine, a part of exhaust gas generated is catalyzed and then discharged to the atmosphere, another part of exhaust gas is supercharged again and enters the engine, and the part of exhaust gas can be combusted again in a cylinder of the engine to reduce nitrogen oxides (NOx) in the discharged gas and reduce emission of pollutants.
An engine system 100 with low pressure EGR according to an embodiment of the present invention is described below with reference to fig. 1-2.
As shown in fig. 1, engine system 100 includes engine 110, engine radiator 120, cabin heat exchanger 130, and cabin radiator 140, an inlet of engine radiator 120 is communicated with an outlet of engine 110, an outlet of engine radiator 120 is communicated with an inlet of engine 110, and an outlet of engine radiator 120 is communicated with an inlet of engine 110; an inlet of the cabin radiator 140 is selectively communicated with an outlet of the cabin heat exchanger 130, and an inlet of the cabin radiator 140 is communicated with an outlet of the cabin heat exchanger 130; the outlet of nacelle radiator 140 is also in selective communication with the outlet of engine 110, and the outlet of nacelle radiator 140 is also in communication with the inlet of engine 110.
The engine 110 continues to output power to the outside by continuing to do work, and the temperature adjustment of the engine 110 with low-pressure EGR can be simultaneously adjusted by the cabin cooling cycle with a low coolant temperature and the engine 110 cooling cycle with a high coolant temperature; an inlet of the engine radiator 120 is connected to an outlet of the coolant on the engine 110, and an outlet of the engine radiator 120 is connected to an inlet of the coolant on the engine 110, so as to realize circulation of the coolant on the engine 110, and the engine radiator 120 may be adapted to reduce the temperature of the coolant in the circulation of the coolant on the engine 110 and heat the gas entering the cabin; during the operation of engine 110, the temperature of the coolant in the coolant circulation of engine 110 is relatively high, and may be suitable for assisting in adjusting the intake air temperature of engine 110, so as to ensure the thermal efficiency of engine 110.
According to the engine system 100 of the present invention, the liquid outlet of the engine 110 is selectively communicated with the liquid inlet of the nacelle radiator 140, so that the cooling liquid of the engine 110 can be exchanged with the cooling liquid in the nacelle cooling cycle, and due to the low temperature of the cooling liquid in the nacelle cooling cycle, the cooling liquid after passing through the engine 110 flows out from the liquid outlet of the engine 110, and part of the cooling liquid flows to the liquid inlet of the nacelle radiator 140, so as to increase the temperature of the cooling liquid in the nacelle cooling cycle.
Specifically, the cabin radiator 140 may heat air entering the engine 110, and may adjust an intake temperature by controlling a flow rate of a cooling liquid in the cabin radiator 140, and the temperature of the cooling liquid may also be adjusted by selecting whether a liquid outlet of the engine 110 is communicated with the cabin radiator 140, and the temperature of the cooling liquid passing through the engine 110 is higher, so that the temperature of the cabin radiator 140 may be effectively increased, so that the cabin radiator 140 may heat air entering the engine 110, so that the air entering the engine 110 may maintain a desired temperature, and particularly, when a vehicle is cold-started, the liquid outlet of the engine 110 may be communicated with a liquid inlet of the cabin radiator 140, so as to quickly adjust the engine 110 and the cabin to a desired state, and reduce a heat transfer loss of the engine 110.
The cabin heat exchanger 130 is a part of a cabin cooling cycle, and outside air can pass through the cabin heat exchanger 130 and then enter the cabin through the engine radiator 120, so as to ensure that the temperature of the air entering the cabin is not too low or too high, thereby reducing heat transfer loss of the engine 110.
According to the engine system 100 with low-pressure EGR of the present invention, the engine system 100 comprises the engine radiator 120 and the cabin radiator 140, wherein the liquid outlet of the engine 110 is selectively communicated with the liquid inlet of the cabin radiator 140, or the liquid outlet of the cabin radiator 140 is communicated with the liquid inlet of the engine 110, so that the cabin cooling cycle is selectively communicated with the cabin cooling cycle, the temperature of the cooling liquid in the cabin cooling cycle can be reduced, the temperature of the cooling liquid in the cabin cooling cycle can be increased, the service performance of the engine 110 under different working conditions can be improved, the adaptability of the engine 110 can be improved, and the heat transfer loss of the engine 110 can be reduced.
The engine has controllable air inlet temperature, improves the starting performance of the engine at low temperature, and simultaneously the engine coolant circulation and the engine compartment coolant circulation are mutually intersected, so that the temperature of the coolant can be regulated more quickly, and the performance of the vehicle is improved. The invention aims to fully utilize the heat emitted by an engine, adjust the air inlet temperature of the engine and the temperature in the engine room, control the temperature of the engine room, ensure that the engine works in a proper temperature range, accelerate the warming-up speed at low temperature, control the air inlet temperature of the engine, ensure that the engine has ideal air inlet temperature, ensure the starting performance of the engine at low temperature, ensure that the cooling liquid circulation of the engine and the cooling liquid circulation of the engine room have a junction so as to more quickly regulate and teach the temperature of the cooling liquid of the engine and the cooling liquid of the engine room.
According to an embodiment of the invention, a first on-off valve 101 is arranged between the liquid outlet of the nacelle radiator 140 and the liquid inlet of the nacelle heat exchanger 130, and a second on-off valve 102 is arranged between the liquid inlet of the nacelle radiator 140 and the liquid outlet of the engine 110.
The first on-off valve 101 arranged between the liquid inlet of the cabin radiator 140 and the liquid outlet of the cabin heat exchanger 130 can control the on-off of the cabin cooling cycle, and further can control whether the cabin cooling cycle is opened or not, for example, when the temperature is extremely low, the first on-off valve 101 is closed, so that the cabin cooling cycle does not work any more, the temperature of the gas in the cabin is ensured not to be reduced, the air inlet temperature of the engine 110 is increased, and the heat transfer loss is reduced; the second cut-off valve 102 is arranged between the liquid outlet of the engine 110 and the liquid inlet of the cabin radiator 140, whether the cooling liquid circulation of the engine 110 is communicated with the cabin cooling circulation can be controlled, when the temperature is low, the second cut-off valve 102 can be opened, so that the cooling liquid circulation of the engine 110 is communicated with the cabin cooling circulation, the temperature of the cooling liquid in the cabin cooling circulation is increased, the cabin cooling liquid can heat the gas entering the engine 110, and the heat transfer loss is reduced.
According to one embodiment of the present invention, engine system 100 with low pressure EGR further comprises EGR cooler 150, an inlet port of EGR cooler 150 being in selective communication with an outlet port of engine 110, an outlet port of EGR cooler 150 being in communication with an outlet port of engine 110 with an inlet port of engine 110.
As shown in fig. 2, the EGR system is an exhaust gas recirculation system of a vehicle, and after fuel is combusted in the engine 110, a part of exhaust gas generated is catalyzed and then discharged to the atmosphere, another part of the exhaust gas enters the engine 110 after being supercharged again, another part of the exhaust gas needs to be subjected to heat exchange by the EGR cooler 150 before entering the engine 110 again, the EGR cooler 150 can heat or dissipate heat of the exhaust gas, so as to maintain the temperature of the gas re-entering the engine 110 in an ideal state, after the coolant flows out from the liquid outlet of the engine 110, a portion of the coolant flows into the EGR cooler 150, so that the coolant having a higher temperature can heat a portion of the exhaust gas, the temperature of the gas is ensured, so that the gas can be ensured to have a certain temperature after entering the engine 110, the heat transfer loss is reduced, and the heat efficiency of the engine 110 is ensured.
According to an embodiment of the present invention, a third shut-off valve 103 is disposed between the liquid inlet of the EGR cooler 150 and the liquid outlet of the engine 110, the third shut-off valve 103 may be used to control whether the coolant passing through the engine 110 flows to the EGR cooler 150, and the temperature of the EGR cooler 150 may be adjusted by the third shut-off valve 103, which is suitable for the EGR cooler 150 to adjust the temperature of the exhaust gas under different working conditions, so that the engine 110 may be ensured to be in an ideal working state, and the stability of the EGR system is improved.
The third shut-off valve 103 may also be constructed as a flow valve, and the temperature of the EGR cooler 150 is controlled by controlling the opening degree of the flow valve, thereby adjusting the temperature of the gas introduced into the engine 110 to maintain a good thermal efficiency for the combustion of the fuel of the engine 110.
According to one embodiment of the present invention, engine system 100 with low pressure EGR further comprises EGR heater 160, an inlet of EGR heater 160 being in communication with an outlet of EGR cooler 150, an outlet of EGR heater 160 being in communication with an inlet of engine 110.
The exhaust gas enters the EGR heater 160 after passing through the EGR cooler 150, the EGR cooler 150 and the EGR heater 160 can work simultaneously, the EGR heater 160 can heat the coolant, the coolant after passing through the EGR heater 160 flows back into the engine 110 again, and the EGR heater 160 can adjust the temperature of the coolant, so that the EGR cooler 150 can exchange heat with the exhaust gas better, and the combustion of the gas in the engine 110 keeps a good thermal efficiency. It should be noted that the temperature of the coolant after passing through the heat exchanger of the engine 110 is different from that of the coolant after passing through the heat exchanger of the EGR heater 160, and the coolant with different temperature enters the cylinder of the engine 110 to assist in adjusting the intake air temperature of the engine 110, where the EGR heater 160 changes the temperature of the coolant instead of directly heating the exhaust gas, and the exhaust gas adjusts the temperature by exchanging heat with the EGR cooler 150.
According to an embodiment of the invention, the nacelle radiator 140 comprises a first nacelle radiator 141 and a second nacelle radiator 142, an inlet of the first nacelle radiator 141 and an inlet of the second nacelle radiator 142 being in communication with an outlet of the nacelle heat exchanger 130, respectively, and an outlet of the first nacelle radiator 141 and an outlet of the second nacelle radiator 142 being in communication with an inlet of the nacelle heat exchanger 130, respectively.
In order to ensure that the temperature in the cabin is not too high, a first cabin radiator 141 and a second cabin radiator 142 may be provided, and the first cabin radiator 141 and the second cabin radiator 142 may simultaneously radiate heat of the intake air of the engine 110, or may control the temperature of the intake air of the engine 110 by adjusting the flow rates of cooling liquids passing through the first cabin radiator 141 and the second cabin radiator 142, respectively, according to the operating condition of the engine 110, so that the temperature of the intake air of the engine 110 may be maintained in a desired state.
According to an embodiment of the present invention, the engine system 100 with low pressure EGR further includes an intake air heater 170, and the first nacelle radiator 141, the second nacelle radiator 142, and the intake air heater 170 are arranged in order in an intake direction of the engine 110. Under the condition of extremely low temperature, the first cabin radiator 141 and the second cabin radiator 142 can be simultaneously turned off, and the intake air heater 170 is turned on to raise the intake air temperature of the engine 110, so that the intake air temperature of the engine 110 can be kept in a relatively ideal state, and the thermal efficiency of the engine 110 can be further ensured.
According to an embodiment of the present invention, the cabin heat exchanger 130 and the engine radiator 120 are sequentially arranged along the direction in which the outside air enters the cabin, so that the coolant can be rapidly cooled when the temperature of the air just entering the cabin is low, and the coolant can heat the air with low temperature, so as to ensure that the temperature of the air entering the engine 110 is not too low, thereby improving the thermal efficiency of the engine 110.
Further, a variable speed fan 107 is arranged at the air inlet direction of the cabin heat exchanger 130, and the flow rate of air is adjusted by adjusting the rotation speed of the fan 107 to increase or decrease the exchange time of air with the cabin heat exchanger 130 and the engine radiator 120 to adjust the temperature of air entering the cabin, so that the temperature of air is maintained at a more ideal temperature when the engine 110 is running, and after cold start, the temperature of the engine 110 and the cabin can be quickly adjusted to the more ideal temperature to reduce heat transfer loss.
According to an embodiment of the present invention, a pipeline between the liquid outlet of the EGR heater 160 and the liquid inlet of the engine 110, and a pipeline between the liquid outlet of the cabin radiator 140 and the liquid inlet of the engine 110 are at least partially overlapped to form a first overlapped pipeline 104, a first water pump 105 is disposed on the first overlapped pipeline 104, and a second water pump 106 is disposed between the liquid outlet of the cabin radiator 140 and the liquid inlet of the cabin heat exchanger.
The first water pump 105 is suitable for driving the cooling liquid of the engine 110 to circulate, the driving cooling liquid enters the liquid inlet of the engine 110, the cooling liquid passing through the engine 110 can enter the engine radiator 120 or the EGR cooler 150, after flowing out from the liquid outlet of the engine radiator 120 and the liquid outlet of the EGR cooler 150, the cooling liquid is merged in the mixing valve 108 and flows back to the engine 110 under the driving of the first water pump 105 through the first coinciding pipeline 104, through the arrangement of the first coinciding pipeline 104, the cooling liquid can be fully mixed in the coinciding pipelines, the temperature of the cooling liquid is balanced, meanwhile, the arrangement of the cooling liquid flow channels in the engine 110 is reduced, the arrangement of a cooling system of the engine 110 is more reasonable, the mixing valve 108 is suitable for mixing two cooling liquids with different temperatures, and the temperature of the cooling liquid in the first coinciding pipeline 104 is more balanced.
Preferably, a mixing valve 108 may be provided at a junction of the outlet of the engine radiator 120 and the outlet of the EGR cooler 150, and the coolant discharged from the engine radiator 120 and the coolant discharged from the EGR cooler 150 may flow back to the engine through the mixing valve 108, so as to ensure sufficient mixing of the coolants. Correspondingly, a mixing valve may also be provided at the junction of the cabin cooling line and the outlet of the EGR cooler 150.
In the cabin cooling cycle, the cooling liquid passes through the first cabin radiator 141 and the second cabin radiator 142 respectively, the cooling liquid is converged at a liquid outlet of the first cabin radiator 141 and a liquid outlet of the second cabin radiator 142, a part of the cooling liquid flows to the cabin heat exchanger 130, the part of the cooling liquid flows back to the first cabin radiator 141 and the second cabin radiator 142 through a liquid outlet of the cabin heat exchanger 130 after passing through the cabin heat exchanger 130, and the second water pump 106 is arranged between a liquid outlet of the cabin radiator 140 and a liquid inlet of the cabin heat exchanger 130 to ensure that the cabin cooling cycle can operate stably; the other part of the cooling liquid flows to the first superposed pipeline 104, and is converged with the cold area liquid circulation of the engine 110, and enters the engine 110 through the first superposed pipeline 104, and the cooling liquid returns to the cabin cooling circulation again through the liquid outlet of the engine 110, the liquid inlet of the first cabin radiator 141 or the liquid inlet of the second cabin radiator 142 after passing through the engine 110.
A vehicle according to an embodiment of the invention is briefly described below.
According to the vehicle provided with the engine system 100 with low-pressure EGR of the embodiment, the vehicle provided with the engine system 100 with low-pressure EGR of the embodiment is provided with the vehicle according to the embodiment of the invention, so that the air inlet temperature of the engine 110 of the vehicle engine 110 is controllable, the starting performance of the engine at low temperature is improved, meanwhile, the coolant circulation of the engine 110 and the coolant circulation of the engine room are intersected with each other, the temperature of the coolant can be adjusted more quickly, and the performance of the vehicle is improved.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (7)
1. An engine system (100) with low pressure EGR, comprising:
an engine (110);
an engine radiator (120), wherein a liquid inlet of the engine radiator (120) is communicated with a liquid outlet of the engine (110), and a liquid outlet of the engine radiator (120) is communicated with a liquid inlet of the engine (110);
a cabin heat exchanger (130);
a nacelle radiator (140), an inlet of the nacelle radiator (140) being in selective communication with an outlet of the nacelle heat exchanger (130), an outlet of the nacelle radiator (140) being in communication with an inlet of the nacelle heat exchanger (130); wherein
The liquid inlet of the cabin radiator (140) is also selectively communicated with the liquid outlet of the engine (110), and the liquid outlet of the cabin radiator (140) is also communicated with the liquid inlet of the engine (110);
the nacelle radiator (140) comprises: a first cabin radiator (141) and a second cabin radiator (142), wherein a liquid inlet of the first cabin radiator (141) and a liquid inlet of the second cabin radiator (142) are respectively communicated with a liquid outlet of the cabin heat exchanger (130), and a liquid outlet of the first cabin radiator (141) and a liquid outlet of the second cabin radiator (142) are respectively communicated with a liquid inlet of the cabin heat exchanger (130);
further comprising: the first cabin radiator (141), the second cabin radiator (142) and the air inlet heater (170) are sequentially arranged along the air inlet direction of the engine (110);
the cabin heat exchanger (130) and the engine radiator (120) are arranged in sequence in a direction in which outside air enters the cabin.
2. The engine system (100) with low-pressure EGR according to claim 1, characterized in that a first on-off valve (101) is arranged between the inlet of the cabin radiator (140) and the outlet of the cabin heat exchanger (130), and a second on-off valve (102) is arranged between the inlet of the cabin radiator (140) and the outlet of the engine (110).
3. The engine system (100) with low-pressure EGR according to claim 1, further comprising: an EGR cooler (150), an inlet of the EGR cooler (150) being in selective communication with an outlet of the engine (110), an outlet of the EGR cooler (150) being in communication with an inlet of the engine (110).
4. Engine system (100) with low-pressure EGR according to claim 3, characterized in that a third shut-off valve (103) is arranged between the liquid inlet of the EGR cooler (150) and the liquid outlet of the engine (110).
5. The engine system (100) with low-pressure EGR according to claim 3, further comprising: the liquid outlet of EGR heater (160) with the inlet of engine (110) intercommunication.
6. The engine system (100) with low-pressure EGR of claim 1 wherein a line between the outlet of the EGR heater (160) and the inlet of the engine (110), a line between the outlet of the engine radiator (120) and the inlet of the engine (110), and a line between the outlet of the cabin radiator (140) and the inlet of the engine (110) at least partially coincide to form a first coinciding line (104), the first coinciding line (104) having a first water pump (105) disposed thereon;
and a second water pump (106) is arranged between the liquid outlet of the cabin radiator (140) and the liquid inlet of the cabin heat exchanger.
7. A vehicle comprising an engine system (100) with low-pressure EGR according to any of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811453704.9A CN111255595B (en) | 2018-11-30 | 2018-11-30 | Engine system and vehicle with low pressure EGR |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811453704.9A CN111255595B (en) | 2018-11-30 | 2018-11-30 | Engine system and vehicle with low pressure EGR |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111255595A CN111255595A (en) | 2020-06-09 |
| CN111255595B true CN111255595B (en) | 2021-06-18 |
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| CN201811453704.9A Active CN111255595B (en) | 2018-11-30 | 2018-11-30 | Engine system and vehicle with low pressure EGR |
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| CN114183259B (en) * | 2020-09-14 | 2023-05-09 | 广州汽车集团股份有限公司 | EGR rate control method and system with low-pressure EGR system and automobile |
| CN112177755A (en) * | 2020-09-30 | 2021-01-05 | 东风汽车集团有限公司 | Gasoline engine double-ball thermal management optimization method capable of controlling EGR cooling flow |
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